The document discusses conjunctions and their different types. There are three main types of conjunctions: coordinating conjunctions, correlative conjunctions, and subordinating conjunctions. Coordinating conjunctions connect words, phrases, or sentences. The seven coordinating conjunctions are FANBOYS - for, and, nor, but, or, yet, so. Coordinating conjunctions can connect words, prepositional phrases, or simple sentences. Commas are used when joining two independent clauses.